Just to notice, I d o use backup from standby and WAL archive from standby. It is possible. But you have to configure standby with option of wal archive "always".
I guess there are issues with it. If this was so easy then pgbarman and pgbackrest would support it out of the box.
Does anyone use this solution? any recommenations?
Thanks!
Barman will fit most requirements. PgBackRest excels when WAL traffic goes on 100000 files/day or more. I have written an article, not yet publised, on a comparison on the 3 most known solutions. Will post a link as soon as it gets published.